# HappyKey vs ArithmeType

The clearest difference is price: HappyKey at Free against ArithmeType's $9.99. HappyKey also leads on rating (3.7 vs 3.5) and review sentiment (50% vs 40%). ArithmeType's advantage is update cadence (every 5 weeks vs every 8 months). On ratings volume, ads, in-app purchases and device support there is nothing between them.

HappyKey is free to download; ArithmeType costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

HappyKey holds the better App Store score, 3.7 against 3.5. Both are backed by a comparable volume of ratings — 9 and 4 respectively. Written reviews point the same way: 50% of HappyKey's written reviews are positive against 40% of ArithmeType's.

HappyKey ships an update every 8 months, ArithmeType every 5 weeks. The most recent releases landed on September 24, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | HappyKey | ArithmeType |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[3.7 (9 ratings)](https://appshunter.io/ios/app/happykey/id965705471/reviews)** | [3.5 (4 ratings)](https://appshunter.io/ios/app/arithmetype/id6448634447/reviews) |
| Number of ratings | **9** | 4 |
| Positive reviews | **50.0% of reviews** | 40.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 5 weeks** |
| Monetization | **Free** | Paid |
| Size | 26 MB | 8 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Alexander Baratti](https://appshunter.io/developer/1264988386) | [ArithmeType LLC](https://appshunter.io/developer/1684799599) |

## What reviewers say

### HappyKey

[App page](https://appshunter.io/ios/app/happykey/id965705471)

This app offers a specialized keyboard for easily inputting a wide range of mathematical symbols. It includes numbers, operators, pi, infinity, and more, simplifying the process of writing math notation on your device.

**Highlights:** Specialized math symbol keyboard, Includes numbers and operators, Supports pi and infinity symbols, Simplifies math notation input, Customizable keyboard layout

**In-app purchases:** none


### ArithmeType

[App page](https://appshunter.io/ios/app/arithmetype/id6448634447)

This app provides a specialized keyboard for easily typing mathematical expressions. It simplifies access to symbols from arithmetic to calculus, with features for early learners and accessibility support. It works across various websites and apps.

**Highlights:** Simplified math typing, Easy symbol access, Works with any app, Accessibility support (VoiceOver, Switch Access, Eye Gaze), Removable section covers for learners, Covers arithmetic through calculus

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is HappyKey free?

HappyKey is free to download, with no in-app purchases.

### Is ArithmeType free?

ArithmeType costs $9.99, with no in-app purchases.

### Which has better reviews, HappyKey or ArithmeType?

HappyKey is rated higher. HappyKey averages 3.7 out of 5 from 9 ratings, while ArithmeType averages 3.5 from 4 ratings.

### Do HappyKey or ArithmeType have ads?

Neither HappyKey nor ArithmeType shows ads.

### Which is updated more often, HappyKey or ArithmeType?

HappyKey ships an update every 8 months, and ArithmeType every 5 weeks. Most recently, HappyKey was updated on September 24, 2026 and ArithmeType on September 21, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*